Were Claire S. Farley’s LYB share transactions open-market buys or sells?

No open-market trades occurred. The Form 4 shows a grant of 2,321 shares at zero cost and a 565‑share disposition solely to satisfy tax withholding when restricted stock units vested, which is a routine, non-market equity-compensation event for LyondellBasell director Claire S. Farley.

LyondellBasell (NYSE: LYB) director logs RSU grant and tax withholding

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

LyondellBasell Industries director Claire S. Farley reported routine equity-compensation activity. On May 21, she received a grant of 2,321 Class A Ordinary Shares at no cost, representing restricted stock units that vest on May 21, 2027 under the long-term incentive plan.

On May 22, 2,917 previously granted restricted stock units vested, and 565 shares were withheld by the company to cover tax withholding obligations, a non‑market tax-withholding disposition rather than an open-market sale. After these transactions, she directly held 26,341 shares, including 5,238 restricted stock units scheduled to vest on future dates.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider FARLEY CLAIRE S

Role null

Type	Security	Shares	Price	Value
Tax Withholding	Class A Ordinary Shares	565	$69.72	$39K
Grant/Award	Class A Ordinary Shares	2,321	$0.00	--

Holdings After Transaction: Class A Ordinary Shares — 26,341 shares (Direct, null)

Footnotes (1)

Includes 5,238 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,917 that vest on May 22, 2026. The 2,321 RSUs reported on this Form 4 vest on May 21, 2027. On May 22, 2026 the reporting person's restricted stock units automatically vested 2,917 shares. 565 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations. Includes 2,321 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 21, 2027.

Key Figures

RSU grant: 2,321 shares Tax-withholding shares: 565 shares Shares after transactions: 26,341 shares +3 more

6 metrics

RSU grant 2,321 shares Class A Ordinary Shares granted on May 21, 2026 at $0.0000

Tax-withholding shares 565 shares Withheld on May 22, 2026 at $69.72 per share

Shares after transactions 26,341 shares Direct holdings following May 22, 2026 disposition

RSUs outstanding 5,238 RSUs Granted under long-term incentive plan, vesting on future dates

RSUs vesting 2027 2,321 RSUs Vesting on May 21, 2027 per footnote

RSUs vested 2026 2,917 RSUs Automatically vested on May 22, 2026 before tax withholding

Key Terms

restricted stock units ("RSUs"), long-term incentive plan, tax withholding obligations, grant, award, or other acquisition, +1 more

5 terms

restricted stock units ("RSUs") financial

"Includes 5,238 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

long-term incentive plan financial

"restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan"

A long-term incentive plan is a company program that pays executives or employees with stock, options, or cash tied to multi-year performance goals, where the rewards become theirs only after meeting conditions over time. Think of it as a delayed bonus or retirement-style reward that aligns employees’ interests with shareholders by encouraging them to boost long-term value; investors watch these plans because they affect pay costs, share dilution and management incentives.

tax withholding obligations financial

"565 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations"

grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

Payment of exercise price or tax liability by delivering securities financial

"transaction_code_description: Payment of exercise price or tax liability by delivering securities"

Form 4 Insider Transactions: What Each Field Means →

05/26/2026 - 04:04 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

FARLEY CLAIRE S

(Last)

(First)

(Middle)

4TH FLOOR

ONE VINE STREET

(Street)

LONDON

W1J 0AH

(City)

(State)

(Zip)

UNITED KINGDOM

(Country)

2. Issuer Name and Ticker or Trading Symbol
LyondellBasell Industries N.V. [ LYB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Ordinary Shares	05/21/2026		A		2,321	A	$0.00	26,906⁽¹⁾	D
Class A Ordinary Shares	05/22/2026		F		565⁽²⁾	D	$69.72	26,341⁽³⁾	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Includes 5,238 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan, including 2,917 that vest on May 22, 2026. The 2,321 RSUs reported on this Form 4 vest on May 21, 2027.

2. On May 22, 2026 the reporting person's restricted stock units automatically vested 2,917 shares. 565 shares were withheld by the issuer to satisfy the issuer's tax withholding obligations.

3. Includes 2,321 restricted stock units ("RSUs") granted pursuant to the issuer's long-term incentive plan that vest on May 21, 2027.

Remarks:

	/s/ Lara A. Mason, Attorney-in-Fact	05/26/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did LYB director Claire S. Farley report on this Form 4?

Claire S. Farley reported a grant of 2,321 Class A Ordinary Shares on May 21, 2026 and a tax-withholding disposition of 565 shares on May 22, 2026, both tied to restricted stock unit awards under LyondellBasell’s long-term incentive plan.

How many LYB shares does Claire S. Farley hold after these Form 4 transactions?

After the reported transactions, Claire S. Farley directly holds 26,341 Class A Ordinary Shares of LyondellBasell. This figure includes restricted stock units, with 5,238 RSUs granted under the company’s long-term incentive plan that are scheduled to vest on specified future dates.

What restricted stock units did LYB grant to Claire S. Farley in this filing?

LyondellBasell granted Claire S. Farley 2,321 restricted stock units that convert into Class A Ordinary Shares and vest on May 21, 2027. Footnotes indicate these units are part of the issuer’s long-term incentive plan, adding to previously granted RSUs already outstanding.

Why were 565 LYB shares disposed of in Claire S. Farley’s Form 4?

The 565 shares were withheld by LyondellBasell to cover tax withholding obligations when 2,917 restricted stock units vested on May 22, 2026. This tax-withholding disposition is coded “F” and reflects a standard mechanism for paying taxes on equity awards, not a discretionary sale.

How many LYB restricted stock units for Claire S. Farley are scheduled to vest later?

Footnotes state that 5,238 restricted stock units are outstanding for Claire S. Farley, including 2,917 that vest on May 22, 2026 and 2,321 that vest on May 21, 2027. These RSUs are granted under LyondellBasell’s long-term incentive plan for directors.